add:展台

2026-02-19 18:12:19 +08:00
parent c2ca1c9702
commit 9ef764ffa1
6 changed files with 768 additions and 2 deletions
@@ -0,0 +1,96 @@
+using System;
+using System.Windows.Ink;
+using System.Windows.Media.Imaging;
+
+namespace Ink_Canvas.Models
+{
+    public class CapturedImage
+    {
+        public BitmapImage Image { get; }
+        public BitmapImage Thumbnail { get; }
+        public StrokeCollection Strokes { get; }
+        public string Timestamp { get; }
+        public string FilePath { get; }
+
+        public CapturedImage(BitmapImage image)
+        {
+            Image = image;
+            Thumbnail = CreateThumbnail(image);
+            Strokes = new StrokeCollection();
+            Timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
+            FilePath = null;
+        }
+
+        public CapturedImage(BitmapImage image, string filePath)
+        {
+            Image = image;
+            Thumbnail = CreateThumbnail(image);
+            Strokes = new StrokeCollection();
+            FilePath = filePath;
+            Timestamp = TryExtractTimestampFromFilePath(filePath) ?? DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
+        }
+
+        private static string TryExtractTimestampFromFilePath(string filePath)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(filePath)) return null;
+                var name = System.IO.Path.GetFileNameWithoutExtension(filePath);
+                if (DateTime.TryParseExact(
+                        name,
+                        "yyyy-MM-dd HH-mm-ss-fff",
+                        System.Globalization.CultureInfo.InvariantCulture,
+                        System.Globalization.DateTimeStyles.None,
+                        out var dt))
+                {
+                    return dt.ToString("yyyy-MM-dd HH:mm:ss");
+                }
+                if (name.Length >= 23)
+                {
+                    var tail = name.Substring(name.Length - 23);
+                    if (DateTime.TryParseExact(
+                            tail,
+                            "yyyy-MM-dd HH-mm-ss-fff",
+                            System.Globalization.CultureInfo.InvariantCulture,
+                            System.Globalization.DateTimeStyles.None,
+                            out var dt2))
+                    {
+                        return dt2.ToString("yyyy-MM-dd HH:mm:ss");
+                    }
+                }
+                return null;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        private BitmapImage CreateThumbnail(BitmapImage original)
+        {
+            double targetWidth = 290.0;
+            double targetHeight = 180.0;
+            double scale = Math.Min(targetWidth / original.PixelWidth, targetHeight / original.PixelHeight);
+            var thumbnail = new TransformedBitmap(original, new System.Windows.Media.ScaleTransform(scale, scale));
+
+            var bmp = new JpegBitmapEncoder { QualityLevel = 85 };
+            bmp.Frames.Add(BitmapFrame.Create(thumbnail));
+
+            using (var stream = new System.IO.MemoryStream())
+            {
+                bmp.Save(stream);
+                stream.Seek(0, System.IO.SeekOrigin.Begin);
+
+                var result = new BitmapImage();
+                result.BeginInit();
+                result.CacheOption = BitmapCacheOption.OnLoad;
+                result.StreamSource = stream;
+                result.EndInit();
+                result.Freeze();
+
+                return result;
+            }
+        }
+    }
+}
+